Question # 1

In case of two identical charges placed certain distance apart, the electric field lines are:

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Straight lines

Sine curves

Curved

Both (A) and (B)

None of these

The time of flight of a projectile motion equal to

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half of the time to reach maximum height

twice the time to reach maximum height

one fourth of time to reach maximum height

time to reach maximum height

Conventionally the angular velocity is directed to an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of the above

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

When a charged particle passes through matter, it produces ionization, this effect is used in

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fission reaction

reactor

radiation detector

fusion reaction

If the velocity time graph is a straight line parallel to time-axis, then it means that:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of above

Fluid A is more viscous than fluid B. While flowing through a pipe of the same dimensions and material which fluid takes longer to travel at 25°C?

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fluid B

fluid A

both take the same time

not possible to determine from given information

Si units of time period is

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second

hertz

revolution

vibration/sec

If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:

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Power

Work

Pressure

None of these

Magnetic effect of current is used:

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In electric motor

To detect current

To measure current

All of these

None of these

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

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Small

Greater

Equal

Sometimes

How many wavelengths of Kr⁸⁶ are these in one metre?

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1553164.13

1650763.73

2348123.73

652189.63

Which one is the case when the wavelength is actually changed?

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When source move relative to observer

When observer move relative to source

When observer moves around a stationary source at the center of circle

When the relative displacement between source and observer is zero

The speed of sound in air is

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320 ms^-1

323 ms^-1

330 ms^-1

333 ms^-1

The energy of photon of energy 1 eV is:

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1240 nm

1040 nm

1000 nm

620 nm

Two forces 3 N and 2 N are at an angle 0 such that the resultant is R.The first force is now increased to 6 N and the resultant becomes 2R.The value of θ is

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30°

60°

90°

120°

The renewable energy source is a biomass which is a

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Rare source

Unlimited source

Potential source

None of these

Coin of radius R is beaten uniform to make a disc of radius 2R.Its moment of inertia.

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Decreases

Increases

Remains the same

Decreases or increases depending on the actual value

The metals become electrically conducting due to their

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Ductility

Hardness

Structure

All of them

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1 PV

2 PV

1/2 PV

Zero

The dimensions [MLT^-1] refers to the quantity

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Momentum

Angular frequency

Angular displacement

Angular acceleration

The setting of Newton's rings is

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A Plano convex lens and the plane glass plate

A Plano convex lens and simple glass sheet

A Plano convex lens (long focal length) and the plane of glass plate

None of these

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